Do you want to know how to develop your skillset to become a Java Rockstar?

Subscribe to our newsletter to start Rocking right now!

To get you started we give you our best selling eBooks for FREE!

 

1. JPA Mini Book

2. JVM Troubleshooting Guide

3. JUnit Tutorial for Unit Testing

4. Java Annotations Tutorial

5. Java Interview Questions

 

and many more ....

 

 

How Do You Serve Your Organization?

A recent coaching client was concerned about the progress his team was making—or really, the lack of progress his team was making. We spoke about the obstacles he had noticed. “The team doesn’t have time to write automated tests. As soon as they finish developing or testing a feature, people get yanked to another project.” “Are people, developers and testers, working together ...

Read More »

The New Agile–More, Please!

The current buzz at the agile world is scale. Now that we know that agile looks golden, we want to apply it to everything. Agile started as a development team practice. Extreme programming, Scrum, Feature Driven Development, and others all originated in software development teams. Since they were successful, it made sense to apply those successes to other teams as ...

Read More »

Three Common Methods Generated in Three Java IDEs

In this post, I look at the differences in three “common” methods [equals(Object), hashCode(), and toString()] as generated by NetBeans 8.0.2, IntelliJ IDEA 14.0.2, and Eclipse Luna 4.4.1. The objective is not to determine which is best, but to show different approaches one can use for implementing these common methods. Along the way, some interesting insights can be picked up ...

Read More »

A beginner’s guide to transaction isolation levels in enterprise Java

java-interview-questions-answers

Introduction A relational database strong consistency model is based on ACID transaction properties. In this post we are going to unravel the reasons behind using different transaction isolation levels and various configuration patterns for both resource local and JTA transactions.           Isolation and consistency In a relational database system, atomicity and durability are strict properties, while ...

Read More »

Asynchronous timeouts with CompletableFuture

One day I was rewriting poorly implemented multi-threaded code that was blocking at some point on Future.get():                   public void serve() throws InterruptedException, ExecutionException, TimeoutException { final Future<Response> responseFuture = asyncCode(); final Response response = responseFuture.get(1, SECONDS); send(response); } private void send(Response response) { //... } This was actually an Akka application ...

Read More »

Parse.com anonymous and registered users (Android)

Introduction When writing a mobile application you mostly always need a way to store the information outside of the application itself so the data is accessible to not only the application itself on a specific device, but on every device the application is installed on and perhaps even web applications. This means the application will need some sort of a ...

Read More »

Spring retry – ways to integrate with your project

spring-interview-questions-answers

If you have a need to implement robust retry logic in your code, a proven way would be to use the spring retry library. My objective here is not to show how to use the spring retry project itself, but in demonstrating different ways that it can be integrated into your codebase. Consider a service to invoke an external system: ...

Read More »

Adding OpenSSL User-Defined Types to PostgreSQL

PostgreSQL supports user-defined types (UDT). These types can be used to provide type-safety on user-defined functions when we would otherwise be forced to use simple BLOB objects. This comes at a significant cost. Many databases support UDT but implementation details vary widely so there’s a significant amount of vendor lock-in. In addition C language UDT require deployment via PostgreSQL extensions ...

Read More »

R: Featuring engineering for a linear model

I previously wrote about a linear model I created to predict how many people would RSVP ‘yes’ to a meetup event and having not found much correlation between any of my independent variables and RSVPs was a bit stuck. As luck would have it I bumped into Antonios at a meetup a month ago and he offered to take a ...

Read More »

Want to take your Java skills to the next level?

Grab our programming books for FREE!

Here are some of the eBooks you will get:

  • Spring Interview QnA
  • Multithreading & Concurrency QnA
  • JPA Minibook
  • JVM Troubleshooting Guide
  • Advanced Java
  • Java Interview QnA
  • Java Design Patterns